Concerns for the welfare of a man were raised near Victoria Embankment at around 10.10am today (October 8).
Officers and London Ambulance Service crews attended and engaged with the man.
He was treated at the scene before being taken to hospital.
Westminster Bridge was closed as the incident was dealt with, however, it has since reopened.
A spokesperson for London Ambulance Service said: “We were called today (Wednesday 8) at 10.10am to reports of an incident on Westminster Bridge.
“We sent resources including ambulance crews, an emergency planning manager, an incident response officer and members of our Hazardous Area Response Team (HART).
“We treated a man at the scene before taking him to hospital.”
A spokesperson for Metropolitan Police said: “Police are currently on Westminster Bridge following concerns for the welfare of a man.
“Officers were called at 10:12hrs on Wednesday, 8 October and are now in the process of speaking to the man.
“The bridge is currently closed to traffic and we ask people to avoid the area at this time.”
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